If black women in jobs like hers can't be expected to answer serious questions by male members of congress, it may just be that they shouldn't be in jobs where they have to answer serious questions of that type by the nation's elected representatives.
Of course that would be idiotic and racist, but that would seem to be the implication.
Ted Cruz is interesting, around this "white" business. He's Hispanic, his father left Cuba after being persecuted there politically. Hispanic people can be white of course, but Hispanics are often considered their own racial category in the US. Interestingly though, many Democrats seem to think of Republican Hispanics as being white.